Description: At this exhibit, three rotating cubes, featuring modern and historic satellite images, demonstrate some of the important environmental changes that NASA’s satellites are tracking from space, including population growth, deforestation, and ozone depletion. All three of these continue to be important issues today. Another environmental problem being studied by NASA is global warming. Many of the Earth Observing System satellite missions are designed to help scientists better understand and monitor global climate change. To learn more about climate change, visit the Earth Observatory website: http://earthobservatory.nasa.gov/Library/GlobalWarming/warming.html Key message: Satellites are helping us study important environmental changes. Student Challenge: Between which years did the most deforestation happen in Brazil? What other types of change could you track from space?